What's the difference between "all the same" plastic wrap in the supermarket? How to choose? How to use it to be more "fresh"? In fact, there is also a special use of plastic wrap, let's take a look!
The plastic wrap sold in the market can be divided into three categories according to the material:
1. PE (polyethylene) plastic wrap
Most of the products sold in supermarkets are of this type. This kind of plastic wrap has good waterproof and breathable properties, especially suitable for packaging fresh fruits and vegetables, frozen food, etc. PE plastic wrap can be used for refrigerator preservation, but it cannot be used for microwave heating.
2. PVC (polyvinyl chloride) plastic wrap
It is commonly used and sold in wholesale markets, farmers' markets. The advantages are good transparency, high viscosity, and good elasticity. The disadvantage is poor thermal stability, and plasticizers that are not friendly to human health will be released at high temperatures.
At present, this type of plastic wrap is mainly used to package vegetables and agricultural products at room temperature.
3. PVDC (polyvinylidene chloride) plastic wrap
It has the characteristics of good freshness, strong and easy to adhere, and can prevent water evaporation, and is mainly used for the packaging and preservation of meat, cooked food, ham and other foods.
By doing these three things, you can feel safe and secure when you heat food
It is best to use glass, ceramic or microwave oven containers when heating food, and if you really need to cover the container with plastic wrap, you should pay attention to the following points:
1. If there is no indication that the plastic wrap is suitable for microwave oven, it must not be used for microwave heating.
The maximum heat-resistant temperature marked by different brands of high-temperature cling film is different, and when heating food in the microwave oven, you should try to choose plastic wrap with higher heat resistance, but the heating time should not be too long.
2. Use a toothpick to prick a few small holes in the plastic wrap.
Before heating food, you can use a toothpick to prick a few small holes in the plastic wrap, which is conducive to the evaporation of water vapor, otherwise it is easy to burst the plastic wrap due to gas expansion, and even cause danger.
3. Do not come into direct contact with food.
In fact, whether it is used for heating or not, it is recommended to use plastic wrap in conjunction with a deeper container so that the plastic wrap is at least two centimeters away from the food to avoid direct contact with the food itself.
In particular, oily foods are prone to damage the plastic wrap and stick to the food after heating.
When using plastic wrap at room temperature, pay attention to the following points:
1. Do not cover hot dishes fresh out of the pan with plastic wrap. Because covering hot dishes with plastic wrap not only does not preserve the vitamin C in the vegetables, but will accelerate its loss. You can choose heat-resistant glass, porcelain plates, etc. to cover hot dishes and rice.
2. No matter what kind of plastic wrap is used, it should not be in direct contact with alcoholic food, and it is not suitable to wrap oily cooked food and meat for a long time.
3. PVDC plastic wrap can provide an ideal shelf life because of its good moisturizing properties, and can be used to wrap fresh fruits and vegetables, but it is recommended not to exceed 12 hours.
